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Double-aging heat treatment process for S520B material for low-temperature compressor

A technology of S520B and aging treatment, which is applied in the field of heat treatment process, can solve the problems of first pass and difficulty in guaranteeing mechanical properties, and achieve the effect of improving stability

Active Publication Date: 2016-01-06
SHENYANG TURBO MASCH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the traditional heat treatment process of S520B materials used in low-temperature compressors is solution treatment + aging treatment. It is difficult to ensure that the mechanical properties of S520B low-temperature parts after the traditional heat treatment process are qualified once, and generally require multiple repairs to pass.

Method used

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  • Double-aging heat treatment process for S520B material for low-temperature compressor
  • Double-aging heat treatment process for S520B material for low-temperature compressor
  • Double-aging heat treatment process for S520B material for low-temperature compressor

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Embodiment 1

[0016] S520B material for cryogenic centrifugal compressor parts, its chemical composition: C: 0.031wt.%; Si: 0.31wt.%; Mn: 0.59wt.%; Cr: 15.41wt.%; Ni: 5.67wt.%; Mo: 0.73 wt.%; S: 0.003 wt.%; P: 0.021 wt.%; Nb: 0.37 wt.%; Cu: 1.34 wt.%; It is heat treated, including the following steps:

[0017] (1) Solution treatment, heat preservation at 1050°C for 2.0 hours, then oil (or water) cooling;

[0018] (2) Aging treatment, heat preservation at 610°C for 4 hours, then air cooling;

[0019] (3) For the S520B material after the aging treatment in step (2), a secondary aging treatment is added, that is, heat preservation at 610° C. for 4 hours, and then air cooling.

Embodiment 2

[0032] S520B material for cryogenic centrifugal compressor parts, its chemical composition: C: 0.031wt.%; Si: 0.31wt.%; Mn: 0.59wt.%; Cr: 15.41wt.%; Ni: 5.67wt.%; Mo: 0.73 wt.%; S: 0.003 wt.%; P: 0.021 wt.%; Nb: 0.37 wt.%; Cu: 1.34 wt.%; It is heat treated, including the following steps:

[0033] (1) Solution treatment, heat preservation at 1050°C for 3.0 hours, then oil (or water) cooling;

[0034] (2) Aging treatment, heat preservation at 590°C for 5 hours, then air cooling;

[0035] (3) For the S520B material after the aging treatment in step (2), a secondary aging treatment is added, that is, heat preservation at 590°C for 5 hours again, and then air cooling.

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Abstract

The invention discloses a double-aging heat treatment process for an S520B material for a low-temperature compressor and belongs to the technical field of heat treatment processes. The process comprises the following steps: (1) solid solution treatment: preserving heat at 1050 DEG C for 2.0-3.0 hours and then carrying out oil cooling; (2) primary aging treatment: preserving heat at a temperature within the range of 590-610 DEG C for 4-5 hours and then carrying out air cooling; (3) additionally performing secondary aging treatment on the S520B material after being treated by aging in the step (2), namely preserving heat at a temperature within the range of 590-610 DEG C for 4-5 hours and then carrying out air cooling. The first pass filed of the low-temperature mechanical properties of low-temperature compressor parts treated through the double-aging heat treatment process is greatly increased.

Description

technical field [0001] The invention relates to the technical field of heat treatment process, in particular to a heat treatment process of S520B material for low-temperature compressors. The process is suitable for heat treatment of S520B material for low-temperature parts of centrifugal compressors, and can also be applied to S520B for workpieces with low temperature requirements in other centrifuges. Heat treatment of materials. Background technique [0002] At present, the traditional heat treatment process of S520B materials for low-temperature compressors is solution treatment + aging treatment. It is difficult for S520B low-temperature parts treated by traditional heat treatment methods to ensure that the mechanical properties are qualified once. Contents of the invention [0003] The purpose of the present invention is to provide a dual-aging heat treatment process for S520B materials used in low-temperature compressors. By improving the heat treatment process, the...

Claims

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Application Information

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IPC IPC(8): C21D6/00C21D1/78C22C38/48
Inventor 张忠和谢刚张会国王飞宇张尔康邹鹏
Owner SHENYANG TURBO MASCH CORP
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